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| author | David S. Miller <davem@davemloft.net> | 2012-05-30 13:41:01 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-05-30 13:41:01 -0700 |
| commit | ae251b0b58b6fff00a572fe1497eddec8433a9d3 (patch) | |
| tree | 84a641823647c7996b6269b18276e722e9cb8022 | |
| parent | 35c166e492b1c806b1e0c1d26f4e1385a7cfb055 (diff) | |
| download | glibc-ae251b0b58b6fff00a572fe1497eddec8433a9d3.zip glibc-ae251b0b58b6fff00a572fe1497eddec8433a9d3.tar.gz glibc-ae251b0b58b6fff00a572fe1497eddec8433a9d3.tar.bz2 | |
Fix underflow generation in soft-fp.
* soft-fp/soft-fp.h (FP_CUR_EXCEPTIONS): Define.
(FP_TRAPPING_EXCEPTIONS): Provide default implementation.
* sysdeps/sparc/sparc32/soft-fp/sfp-machine.h
(FP_TRAPPING_EXCEPTIONS): Define.
* sysdeps/sparc/sparc64/soft-fp/sfp-machine.h
(FP_TRAPPING_EXCEPTIONS): Define.
* soft-fp/op-common.h (_FP_PACK_SEMIRAW): Signal underflow for
subnormals only when inexact has been signalled or underflow
exceptions are enabled.
(_FP_PACK_CANONICAL): Likewise.
| -rw-r--r-- | ChangeLog | 13 | ||||
| -rw-r--r-- | soft-fp/op-common.h | 13 | ||||
| -rw-r--r-- | soft-fp/soft-fp.h | 7 | ||||
| -rw-r--r-- | sysdeps/sparc/sparc32/soft-fp/sfp-machine.h | 3 | ||||
| -rw-r--r-- | sysdeps/sparc/sparc64/soft-fp/sfp-machine.h | 3 |
5 files changed, 34 insertions, 5 deletions
@@ -1,3 +1,16 @@ +2012-05-30 David S. Miller <davem@davemloft.net> + + * soft-fp/soft-fp.h (FP_CUR_EXCEPTIONS): Define. + (FP_TRAPPING_EXCEPTIONS): Provide default implementation. + * sysdeps/sparc/sparc32/soft-fp/sfp-machine.h + (FP_TRAPPING_EXCEPTIONS): Define. + * sysdeps/sparc/sparc64/soft-fp/sfp-machine.h + (FP_TRAPPING_EXCEPTIONS): Define. + * soft-fp/op-common.h (_FP_PACK_SEMIRAW): Signal underflow for + subnormals only when inexact has been signalled or underflow + exceptions are enabled. + (_FP_PACK_CANONICAL): Likewise. + 2012-05-30 H.J. Lu <hongjiu.lu@intel.com> [BZ #14183] diff --git a/soft-fp/op-common.h b/soft-fp/op-common.h index b70026f..db75af5 100644 --- a/soft-fp/op-common.h +++ b/soft-fp/op-common.h @@ -1,5 +1,5 @@ /* Software floating-point emulation. Common operations. - Copyright (C) 1997,1998,1999,2006,2007 Free Software Foundation, Inc. + Copyright (C) 1997,1998,1999,2006,2007,2012 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson (rth@cygnus.com), Jakub Jelinek (jj@ultra.linux.cz), @@ -146,7 +146,11 @@ do { \ if (!_FP_EXP_NORMAL(fs, wc, X) && !_FP_FRAC_ZEROP_##wc(X)) \ { \ if (X##_e == 0) \ - FP_SET_EXCEPTION(FP_EX_UNDERFLOW); \ + { \ + if ((FP_CUR_EXCEPTIONS & FP_EX_INEXACT) \ + || (FP_TRAPPING_EXCEPTIONS & FP_EX_UNDERFLOW)) \ + FP_SET_EXCEPTION(FP_EX_UNDERFLOW); \ + } \ else \ { \ if (!_FP_KEEPNANFRACP) \ @@ -226,13 +230,16 @@ do { \ { \ X##_e = 1; \ _FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc); \ + FP_SET_EXCEPTION(FP_EX_INEXACT); \ } \ else \ { \ X##_e = 0; \ _FP_FRAC_SRL_##wc(X, _FP_WORKBITS); \ - FP_SET_EXCEPTION(FP_EX_UNDERFLOW); \ } \ + if ((FP_CUR_EXCEPTIONS & FP_EX_INEXACT) \ + || (FP_TRAPPING_EXCEPTIONS & FP_EX_UNDERFLOW)) \ + FP_SET_EXCEPTION(FP_EX_UNDERFLOW); \ } \ else \ { \ diff --git a/soft-fp/soft-fp.h b/soft-fp/soft-fp.h index 46cb1cf..750c7fe 100644 --- a/soft-fp/soft-fp.h +++ b/soft-fp/soft-fp.h @@ -128,6 +128,13 @@ #define FP_CLEAR_EXCEPTIONS \ _fex = 0 +#define FP_CUR_EXCEPTIONS \ + (_fex) + +#ifndef FP_TRAPPING_EXCEPTIONS +#define FP_TRAPPING_EXCEPTIONS 0 +#endif + #define _FP_ROUND_NEAREST(wc, X) \ do { \ if ((_FP_FRAC_LOW_##wc(X) & 15) != _FP_WORK_ROUND) \ diff --git a/sysdeps/sparc/sparc32/soft-fp/sfp-machine.h b/sysdeps/sparc/sparc32/soft-fp/sfp-machine.h index 4314082..e60f1ca 100644 --- a/sysdeps/sparc/sparc32/soft-fp/sfp-machine.h +++ b/sysdeps/sparc/sparc32/soft-fp/sfp-machine.h @@ -1,6 +1,6 @@ /* Machine-dependent software floating-point definitions. Sparc userland (_Q_*) version. - Copyright (C) 1997,1998,1999, 2002, 2006 Free Software Foundation, Inc. + Copyright (C) 1997,1998,1999,2002,2006,2012 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson (rth@cygnus.com), Jakub Jelinek (jj@ultra.linux.cz) and @@ -192,6 +192,7 @@ do { \ _FPU_GETCW(_fcw); \ } while (0) +#define FP_TRAPPING_EXCEPTIONS ((_fcw >> 23) & 0x1f) #define FP_INHIBIT_RESULTS ((_fcw >> 23) & _fex) /* Simulate exceptions using double arithmetics. */ diff --git a/sysdeps/sparc/sparc64/soft-fp/sfp-machine.h b/sysdeps/sparc/sparc64/soft-fp/sfp-machine.h index 36f92d6..9bd4298 100644 --- a/sysdeps/sparc/sparc64/soft-fp/sfp-machine.h +++ b/sysdeps/sparc/sparc64/soft-fp/sfp-machine.h @@ -1,6 +1,6 @@ /* Machine-dependent software floating-point definitions. Sparc64 userland (_Q_* and _Qp_*) version. - Copyright (C) 1997, 1998, 1999, 2006 Free Software Foundation, Inc. + Copyright (C) 1997, 1998, 1999, 2006, 2012 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson (rth@cygnus.com), Jakub Jelinek (jj@ultra.linux.cz) and @@ -100,6 +100,7 @@ do { \ _FPU_GETCW(_fcw); \ } while (0) +#define FP_TRAPPING_EXCEPTIONS ((_fcw >> 23) & 0x1f) #define FP_INHIBIT_RESULTS ((_fcw >> 23) & _fex) /* Simulate exceptions using double arithmetics. */ |